GB2274783A - Intravenous infusion set with needle protection - Google Patents

Intravenous infusion set with needle protection Download PDF

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Publication number
GB2274783A
GB2274783A GB9401857A GB9401857A GB2274783A GB 2274783 A GB2274783 A GB 2274783A GB 9401857 A GB9401857 A GB 9401857A GB 9401857 A GB9401857 A GB 9401857A GB 2274783 A GB2274783 A GB 2274783A
Authority
GB
United Kingdom
Prior art keywords
needle
sleeve
infusion set
intravenous infusion
body moulding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9401857A
Other versions
GB2274783B (en
GB9401857D0 (en
Inventor
Graham Cameron Grant
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB9401857D0 publication Critical patent/GB9401857D0/en
Publication of GB2274783A publication Critical patent/GB2274783A/en
Application granted granted Critical
Publication of GB2274783B publication Critical patent/GB2274783B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/06Body-piercing guide needles or the like
    • A61M25/0612Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders
    • A61M25/0637Butterfly or winged devices, e.g. for facilitating handling or for attachment to the skin
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/06Body-piercing guide needles or the like
    • A61M25/0612Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders
    • A61M25/0631Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders having means for fully covering the needle after its withdrawal, e.g. needle being withdrawn inside the handle or a cover being advanced over the needle
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/3243Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/3243Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/3275Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel being connected to the needle hub or syringe by radially deflectable members, e.g. longitudinal slats, cords or bands

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

The infusion set which may be of winged needle type incorporates a hypodermic needle (12) to which infusant is delivered, the needle being located within a small diameter cannula in the form of a plastics material sleeve (10) which is intended to be inserted into a patient's vein. The needle (12) is slidable axially between two limiting positions within the sleeve (10) such that, when in a first of the positions, a sharp tip end (13) of the needle projects beyond the sleeve and, when in the second position, the sharp tip end (13) of the needle is retracted relative to the sleeve and is located wholly within the sleeve. In use of the infusion set, after the needle has been inserted into a vein the tip end of the needle is retracted into and remains within the sleeve thereby reducing the risk of "needlestick". <IMAGE>

Description

2274783 INTRAVENOUS iNFUSION SET This invention relates to an intravenous
infusion set for medical use and, in particular, to an infusion set which provides for a reduced possibility of needlestick injury during use of the infusion set. The invention has particular application to infusion sets of the winged needle type but does have more general application.
whilst needlestick injuries have always presented a problem to the medical profession, the problem has become significantly greater as a result of the current prevalence of Human Immunodeficiency Virus (HIV) and L-he acute cross-infection risks that are inherent in treating HIV affected patients. Consequently, there is now a is greater responsibility on institutions that employ medical and paramedical personnel to provide equipment that is as safe as possible when used routinely in the treatment of patients, both in operating theatre and ward situations. However, there is also a conflicting pressure to which medical institutions are subject, that is a pressure to reduce expenditure and to minimise costs in relation to both medical equipment and human resources. Therefore, in the context of intravenous infusion sets, which are used extensively in hospitals, there is a need to provide devices that are saf e to use and are inexpensive to produce.
The present invention seeks to meet this need by providing an intravenous infusion set which comprises a hypodermic needle, a length of flexible tubing connecting with the needle and arranged in use for delivering liquid to the needle, and a sleeve in which the needle is located. The needle is slidable axially between two limiting Dositions within the sleeve. When in a first of the positions, a sharp tip end of the needle projects beyond the sleeve to facilitate insertion of the sleeve into a person's vein and, when in the second position, the sharp tip end of the needle is retracted relative to the sleeve and is located wholly within the sleeve.
When using the infusion set and inserting it into a patient, the needle is first moved to the first position, in which the sharp tip end of the needle projects ahead of the sleeve. The needle is then held in that position whilst the sharp tip end of the needle and the sleeve are inserted into the patient's vein. Thereafter, the needle is retracted to the second position and the infusion set is taped or otherwise held in position an the patient with the tip end of the needle in its retracted position. When the infusion set is to be disconnected from the patient, the entry point to the patient's vein is covered with a pad or the like and the infusion set is then released from the patient. Because the sharp tip end of is the needle has previously been retracted to the second position, the attending medical practitioner or paramedic will be protected against needlestick injury which might otherwise arise from unexpected movement of the patient and/or elastic movement of the infusion set.
The hypodermic needle may be held in the first position in one of two ways whilst it is being inserted into a patient's vein. It may be clamped relative to the sleeve by the person who is f ixing the infusion set in place, so as to prevent the needle f rom sliding relative to the sleeve. Alternatively, a releaseable detent or friction locking arrangement may be provided between the sleeve and the needle to hold the needle in the first and second positions relative to the sleeve.
A transversely extending wing-like strip of plastics material preferably is secured to the sleeve to facilitate attachment of the infusion set to the patient.
The invention will be more fully understood from the following description of alternative embodiments of the invention. The description is provided by way of example with reference to the accompanying drawings in which:
Figure 1 shows an exploded view of the component parts of the "patient end" of a first infusion set 3 embodiment; Figure 2 shows the infusion set of Figure 1 but with the various component parts assembled and with a hypodermic needle component in a retracted position 5 relative to a containing sleeve; Figure 3 shows a 'further view of the infusion set of Figure 1 but with the hypodermic needle in a forwardly projecting position relative to the containing sleeve; Figure 4 shows a sectional elevation view on an enlarged scale of a portion of a second embodiment of the infusion set, with a hypodermic needle projecting ahead of a containing sleeve; Figure 5 shows the arrangement of Figure 4 but with the hypodermic needle in a retracted position relative to is its containing sleeve; Figure 6 illustrates a perspective view of a third embodiment of the infusion set with a hypodermic needle shown projecting ahead of a containing sleeve; and Figure 7 shows on an enlarged scale a sectional elevation view of the embodiment of figure 6 but with the hypodermic needle in a retracted position relative to the containing sleeve.
As shown in Figure 1, the infusion set comprises a sleeve 10 in t.he form of a length of plastics material tube, the sleeve having a blunt forwardly projecting end 11. A hypodermic needle 12 having a sharp tip end 13 and the usual axial bore is located within the sleeve and is slidable between two positions. When in the first position, as indicated in Figure 3, the sharp tip end 13 of the needle projects ahead of the sleeve 10 and is arranged to be inserted into a patient's vein. However, when in the second position, as indicated in Figure 2, the sharp tip end 13 of the needle 12 is retracted relative to the sleeve 10 and is located wholly within the sleeve. When so located, the needle may not be inserted into a patient and nor may it stick accidentally into a person who is seeking to assist the patient.
The rearward end 14 of the needle 12 is connected permanently to a length of flexible delivery tubing 15 through which an infusant is in use delivered. Also, a thin-walled tube 16 which is formed from a flexible plastics material extends between and connects a rearward end portion 17 of the sleeve 10 and the delivery tubing 15. The tube 16 functions to determine the extent of movement of the needle 12 relative to the sleeve 10 and, thus, when the needle projects ahead of the sleeve 10 the tube 16 is caused to concertina to the condition shown in Figure 3. When the needle 12 is fully retracted within the sleeve 10, the tube 16 straightens to the condition shown in Figure 2.
A transversely extending wing-like strip 18 of is plastics material is secured to the sleeve 10 to facilitate attachment of the infusion set to a patient.
The embodiment of the invention which is illustrated in Figures 4 and 5 is similar to that which is shown in Figures 1 to 3 and like components are identified by like reference numerals. However, in the embodiment shown in Figures 4 and 5 a first body portion 19 is mounted to the rearward end of the needle 12 and is slidable axially within a second body portion 20, the latter being moulded integrally with or mounted to the sleeve 10. The first body portion 19 is formed with two axially spaced circumferentially extending grooves 21, and the extreme end 22 of the second body portion is f ormed with an inwardly directed flange 23 which is arranged to locate within one or the other of the grooves 21. One or the other or both of the f irst and second body portions 19 and 20 is or are formed from a resilient plastics material, so that the flange 23 locates positively and A resiliently within one or the other of the grooves 21.
A deformable tube 24 optionally is provided to interconnect the sleeve 15 and the second body portion 20 of the device. The sleeve is moveable from a straight condition as shown in Figure 5 when the needle 12 is retracted to a expanded position, as shown in Figure 4, when the needle 12 projects from the sleeve 10.
As in the Dreviously described embodiment, with the arrangement as shown in Figures 4 and 5, the needle 12 is first projected beyond the end of the sleeve 10 to permit insertion of the infusion set into a patient's vein.
Thereafter, the needle 12 is retracted relative to the sleeve 10, so that when the device is removed f rom the patient the sharp tip end 13 of the needle is in a retracted condition and is not available to stick into the practitioner who is attending the patient.
In the embodiment of the invention which is shown in Figures 6 and 7, like reference numerals are again used to identify components which are present in the is previously described embodiments. In the embodiment illustrated in Figures 6 and 7, a first body portion 26 is mounted to the rearward end of the hypodermic needle 12 and is slidable axially toward and away from a second body portion 27 through which the needle 12 projects.
The second body portion 27 is moulded integrally with and forms a central body of the wing-like transversely extending strips 18. As in the previous arrangements, the strips 18 are used when taping or otherwise securing the end of the infusion set to a patient.
The second body portion 27 is moulded integrally with or mounted to the plastics material sleeve 10 through which the needle 12 extends. When the body portions 26 and 27 are spaced apart as shown in Figure 7, the sharp tip end 13 of the needle 12 is wholly contained within the sleeve 10. When the body portion 26 is moved axially toward the body portion 27, the tip end 13 of the needle 12 is caused to project ahead of the sleeve 10, as shown in Figure 6.
A piece of flexible (collapsible) tubing 28 connects the body portions 26 and 27, and the tubing 28 is caused to concertina as shown in Figure 6 when the body portions 26 and 27 are moved toward one another and the tip end 13 of the needle 12 is caused to proj ect ahead of the sleeve 10.
A bridging element 29 is moulded integrally with the first body portion 26 and projects ahead of the body portion 26 to overlie the second body portion 27.
Opposite side walls of the bridging element are provided with serrations 30 and similar serrations 31 are formed on the transverse strips 18. The serrations 31 are positioned such that, when the strips 18 are folded upwardly in a direction toward one another and the strips 18 are pressed into contact with the side walls of the bridging element 29, the serrations 30 and 31 will interengage. Thus, when the f irst body portion 26 is is moved toward the second body portion 27, the transverse strips 18 may be f olded upwardly toward one another to sandwich the bridging element 29. Then, by gripping the transverse strips between ones forefinger and thumb, the first and second body portions 26 and 27 may be held in juxtaposed relationship with the tip end 13 of the needle 12 projecting ahead of the sleeve 10. When the tip end of the needle is projected from the sleeve 10 in this way the needle and containing sleeve 10 may be pushed into a persons vein whilst holding the transverse portion 18 in the manner described above. Thereafter, when the needle and sleeve have been inserted, the wing-like strips 18 are released to allow rearward movement of the first body portion 26 and consequential retraction of the needle 12 into the sleeve 10. The strips 18 may then be laid flat against and be taped to the patient to prevent unwanted retraction of the sleeve 10 from the vein.
7

Claims (11)

THE CLAIMS:
1. An intravenous infusion set comprising a hypodermic needle, a length of flexible tubing connecting with the needle and arranged in use for delivering infusant liquid to the needle, and a sleeve in which the needle is located, the needle being slidable axially between two limiting positions within the sleeve such that, when in f irst of the positions, a sharp tip end of the needle projects beyond the sleeve and, when in the second position, the sharp tip end of the needle is retracted relative to the sleeve and is located wholly within the sleeve.
2. The intravenous infusion set as claimed in claim 1, wherein the sleeve comprises a plastics material cannula.
is
3. The intravenous infusion set as claimed in claim 1 or claim 2 and which comprises two relatively moveable body mouldings, a f irst of which carries the needle and the second of which carries the sleeve.
4. The intravenous infusion set as claimed in claim 3, wherein the first body moulding is directly connected to the flexible tubing and is moveable in an axial direction toward and away from the second body moulding.
5. The intravenous infusion set as claimed in claim 3 or claim 4, wherein the second body moulding is formed integrally with wing-like transversely extending strips which are intended to lay flat upon a patient in use of the infusion set and which facilitate taping of the infusion set to the patient.
6. The intravenous infusion set as claimed in any one of claims 3 to 5, wherein the sleeve is formed separately from and is fitted to the second body moulding.
- a -
7. The intravenous infusion set as claimed in any one of claims 3 to 6, wherein a short length of collapsible tubing interconnects the first and second body mouldings.
8. The intravenous infusion set as claimed in any one of claims 3 to 7, wherein the first body moulding is moveable telescopically within the second body moulding and wherein the limits of movement of the needle are determined by mechanically defined limits of relative movement of the first and second body mouldings.
9. The intravenous infusion set as claimed in claim 5, wherein the first body moulding is formed with a bridge which projects forwardly of the first body moulding and overlays the second body moulding, and wherein the transversely extending strips are foldable toward one is another so that they may be used to clamp the bridge when the first body moulding has been moved axially toward the second body moulding, whereby the strips when folded toward one another may be employed manually to hold the first and second body mouldings in juxtaposed relationship when the needle is in the first of the limiting positions with the sharp tip end of the needle projecting from the sleeve.
10. The intravenous infusion set as claimed in claim 9, wherein side portions of the bridge and contacting portions of the transversely extending strips are formed with serrations that are positioned to interengage when the projections are folded up against the bridge.
11. The intravenous infusion set substantially as hereinbefore described with reference to the accompanying drawings.
GB9401857A 1993-02-03 1994-02-01 Intravenous infusion set with needle protection Expired - Fee Related GB2274783B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AUPL708593 1993-02-03

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GB9401857D0 GB9401857D0 (en) 1994-03-30
GB2274783A true GB2274783A (en) 1994-08-10
GB2274783B GB2274783B (en) 1996-12-11

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GB2274783B (en) 1996-12-11
GB9401857D0 (en) 1994-03-30
US5380293A (en) 1995-01-10

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